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Message last updated - Sunday 06th April 2025
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Message last updated - Sunday 06th April 2025
Message last updated - Sunday 06th April 2025
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Introduction
Surface water connections account for a substantial number of developer queries. It is essential for the effective management of our operational risk that we ensure the risk posed from surface water drainage is clearly understood and taken into account during pre-planning and planning consultation. However, the alignment of our risk assessment with the promotion of SuDS principles in co-ordination with statutory consultees can obscure the purpose of our position.
To address this we have restructured our approach to reinforce the principles we currently employ and reflect the practicable limits to a drainage impact assessment. Our aim is to clarify roles and responsibilities and to establish readily definable outcomes from the outset; providing predictability and clarity to developers, local planners and customers.
If you are a consultant, developer or small house builder and you are evaluating your options for surface water disposal from your site or wish to engage with Anglian Water on a surface water connection, there are things you need to do before approaching us. This document will set out the principles, requirements and steps to follow for all surface water queries for new and redevelopment sites within our region, including the position we will take in planning consultations.
You'll find all the detail you need on these pages, if you would like to contact one of our team, email us on: planningliason@anglianwater.co.uk or call us on: 03450 263 912.
You can also view our complete guide.
Term | Explanation |
---|---|
Conveyance |
Refers to the off-site sewerage from the development site boundary to the |
DIA |
Drainage Impact Assessment. A detailed estimation of how a new connection |
DCG |
Design and Construction Guidance. Technical guidance part of the Sewerage |
FWMA (2010) |
Flood and Water Management Act 2010 |
LLFA |
Lead Local Flood Authority |
Outfall |
The point of discharge from a drainage system to the receiving water body |
PFF |
Pass-Forward Flow. Theoretical maximum instantaneous capacity |
NSTS |
Non-Statutory Technical Standards. For sustainable drainage systems |
PPE |
Pre-Planning Enquiry. Developer led consultation |
POC |
Point of Connection |
ReFH2 |
Revitalised Flood Hydrograph method of assessing rainfall run-of |
SSG |
Sewerage Sector Guidance issued by Water UK April 2020 |
SW |
Surface Water. Refers drainage of roofs, driveways and other impermeable |
SW DIA |
Surface Water Drainage Impact Assessment. Assessment on a receiving surface |
SPOC |
Sustainable Point of Connection. The point of connection onto the sewer |
SuDS |
Sustainable Drainage Systems. Drainage systems designed to ensure that |
Conveyance
Refers to the off-site sewerage from the development site boundary to the
point of connection to the public sewer or outfall
DIA
Drainage Impact Assessment. A detailed estimation of how a new connection
will change the performance of the receiving network
DCG
Design and Construction Guidance. Technical guidance part of the Sewerage
Sector Guidance for new development sewerage. Superseded Sewers for
Adoption in April 2020
FWMA (2010)
Flood and Water Management Act 2010
LLFA
Lead Local Flood Authority
Outfall
The point of discharge from a drainage system to the receiving water body
PFF
Pass-Forward Flow. Theoretical maximum instantaneous capacity
NSTS
Non-Statutory Technical Standards. For sustainable drainage systems
PPE
Pre-Planning Enquiry. Developer led consultation
POC
Point of Connection
ReFH2
Revitalised Flood Hydrograph method of assessing rainfall run-of
SSG
Sewerage Sector Guidance issued by Water UK April 2020
SW
Surface Water. Refers drainage of roofs, driveways and other impermeable
surfaces
SW DIA
Surface Water Drainage Impact Assessment. Assessment on a receiving surface
water network
SPOC
Sustainable Point of Connection. The point of connection onto the sewer
network that presents no significant additional risk or that presents a risk
that can be mitigated, either by planned investment or developer funded
enhancements
SuDS
Sustainable Drainage Systems. Drainage systems designed to ensure that
surface water flow from a developed site replicates that from its pre-developed
“greenfield” state, as far as is reasonably practicable